Introducing the most precise electronic speed control on the market. Unlike most other speed controls , this unit pulses power to the motor at an extremely high frequency. By pulsing the voltage, ultra fine control can be achieved forward or reverse and even at very low speeds. If you are building a pan & tilt system or simply need the most precise control of your motor, this is the speed control you need. Handles 10-14VDC and plugs directly into our joystick or an R/C receiver. Works fantastic with all of our Gearmotors as well.